feat(flow): harden host handoff, session UX, and Live Activity brand

- fix(keyboard): drop unusable extensionContext.open; report the real
  result of UIApplication.open and cancel the start watchdog immediately
  on failure with clear "open OSGKeyboard" guidance instead of a 30s spin
- feat(capture): recover from audio route changes (AirPods/wired headset
  plug-unplug) and phone-call interruptions by rebuilding the engine/tap
  against the live hardware format
- feat(home): add a "Start" button in the Home footer when a session is
  inactive and permissions are granted (no-jump manual restart)
- feat(hostapps): expand the return whitelist to 46 apps (Signal, Zoom,
  Instagram, X, Douyin, Zhihu, Bilibili, Things, Firefox, ...) with
  en/zh-Hans names and synced LSApplicationQueriesSchemes
- feat(island): use a "ready" checkmark instead of a mic glyph while idle
  and set a staleDate so an orphaned Live Activity fades after a force-quit
- feat(coldstart): use the template OSG brand mark instead of a system
  waveform glyph in the cold-start overlay
- perf(keyboard): rely on Darwin notifications as the primary session
  signal and drop the fallback poll from 1s to 3s
- fix(keyboard): remove the redundant "Start" text button next to the
  inactive-session hint on the keyboard
- docs: correct the per-take cap to 210s (3.5 min) and document that
  force-quitting no longer resurrects the session (tracker + READMEs)

OSGKeyboardLiveActivity/Assets.xcassets/Contents.json

@@ -0,0 +1,6 @@
+{
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

OSGKeyboardLiveActivity/Assets.xcassets/OSGLogo.imageset/Contents.json

@@ -0,0 +1,15 @@
+{
+  "images" : [
+    {
+      "filename" : "OSGLogo.svg",
+      "idiom" : "universal"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  },
+  "properties" : {
+    "preserves-vector-representation" : true
+  }
+}

OSGKeyboardLiveActivity/Assets.xcassets/OSGLogo.imageset/OSGLogo.svg

@@ -0,0 +1,7 @@
+<svg width="1024" height="1024" viewBox="0 0 1024 1024" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path d="M627.511 512.419C627.511 448.783 576.127 397.197 512.741 397.197C449.355 397.197 397.971 448.783 397.971 512.419C397.971 576.054 449.355 627.641 512.741 627.641V637.837C443.746 637.837 387.814 581.686 387.814 512.419C387.814 443.152 443.746 387 512.741 387C581.736 387 637.668 443.152 637.668 512.419C637.668 581.686 581.736 637.837 512.741 637.837V627.641C576.127 627.641 627.511 576.054 627.511 512.419Z" fill="white"/>
+<path d="M56.2632 512.419C56.2632 581.686 112.195 637.837 181.19 637.837C250.185 637.837 306.117 581.686 306.117 512.419C306.117 443.152 250.185 387 181.19 387C112.195 387 56.2632 443.152 56.2632 512.419Z" fill="white"/>
+<path d="M399.618 562.094L399.618 552.257L512.74 552.257L512.74 562.094L399.618 562.094Z" fill="white"/>
+<path d="M512.741 483.398V473.561H625.864V483.398H512.741Z" fill="white"/>
+<path d="M843.308 387.981C910.987 387.981 966.093 441.8 968.171 508.975H843.308V518.812H968.096C965.014 585.066 910.324 637.836 843.308 637.836C774.313 637.836 718.381 581.904 718.381 512.909C718.381 443.914 774.312 387.981 843.308 387.981ZM968.234 518.812H968.096C968.187 516.855 968.234 514.888 968.234 512.909C968.234 511.593 968.211 510.281 968.171 508.975H968.234V518.812Z" fill="white"/>
+</svg>

OSGKeyboardLiveActivity/FlowLiveActivityWidget.swift

@@ -61,33 +61,24 @@ private struct FlowLiveActivityLockScreenView: View {
             Spacer(minLength: 0)
             FlowLiveActivityTrailingGlyph(phase: phase)
         }
-        .padding(.horizontal, 4)
+        // iOS Live Activity lock-screen content needs margins so the leading
+        // logo and trailing glyph don't touch the card edges.
+        .padding(.horizontal, 16)
+        .padding(.vertical, 12)
     }
 }
 
 /// Branded mark used in compactLeading so users see OSGKeyboard, not the system mic icon.
+/// Transparent white OSG glyphs render directly on the black Dynamic Island.
 private struct FlowLiveActivityBrandMark: View {
     let size: CGFloat
 
     var body: some View {
-        ZStack {
-            Circle()
-                .fill(
-                    LinearGradient(
-                        colors: [
-                            Color(red: 0.35, green: 0.55, blue: 1.0),
-                            Color(red: 0.22, green: 0.38, blue: 0.92)
-                        ],
-                        startPoint: .topLeading,
-                        endPoint: .bottomTrailing
-                    )
-                )
-            Image(systemName: "keyboard")
-                .font(.system(size: size * 0.48, weight: .semibold))
-                .foregroundStyle(.white)
-        }
-        .frame(width: size, height: size)
-        .accessibilityLabel("OSGKeyboard")
+        Image("OSGLogo")
+            .resizable()
+            .aspectRatio(contentMode: .fit)
+            .frame(width: size, height: size)
+            .accessibilityLabel("OSGKeyboard")
     }
 }
 
@@ -105,8 +96,10 @@ private struct FlowLiveActivityTrailingGlyph: View {
                 .progressViewStyle(.circular)
                 .tint(.white)
         case .idle:
-            Image(systemName: "mic.fill")
-                .foregroundStyle(.secondary)
+            // Session ready but NOT listening — avoid a mic glyph so users
+            // don't think the keyboard is recording in the background.
+            Image(systemName: "checkmark.circle.fill")
+                .foregroundStyle(.green)
         }
     }
 }

OSGKeyboardLiveActivity/Info.plist

@@ -3,7 +3,7 @@
 <plist version="1.0">
 <dict>
 	<key>CFBundleDevelopmentRegion</key>
-	<string>en</string>
+	<string>$(DEVELOPMENT_LANGUAGE)</string>
 	<key>CFBundleDisplayName</key>
 	<string>OSGKeyboardLiveActivity</string>
 	<key>CFBundleExecutable</key>